Instead of just constantly claiming that it is so, how about you provide a fact for once and demonstrate that:
a) Such a thing as a "trading key" actually exists; and
b) That Petro has one.
It is infinitely easier to prove something exists than to prove something does not. Since you are the person that is claiming this magical "trading key" actually exists, how about providing some proof? Or even an explanation of what it is supposed to be and what it would do for Petro?